Centrifugal dredging pump



M. SWINTEK GENTRI'FUGAL DREDGING PUMP May 2o. 1924.l

Filed April 17. 1922 f8 l A l /7 Effi' 3 5l, A

5' 34 /f 3 33 I', m

f l r a; #o "lf m m 42 i l "wr-1 --1 ff /o I: km --Jw l Patented May 2o, 1924.

UNITED STATES ingaan ,111x151?.Nr oFFIcE.,

' MARTIN SWINTEK, or EDDYvILLnfIowA; a

CENTRIFUGAL nnnnerne PUMP. i

u Application nlednprii 17, 1922. `serial ne. 554,135.

trifugal Dredging Pump, of `which the kfol-v lowing is a specification.

T he object of this invention is to provide an improved construction for acentrifugal pump especially `adapted for dredging andf similar purposes.

, provide an improved centrifugal dredging charged laterally at the circumference of the .i rotor, thereby causing clogging and excessive -wear between the rotor and shell.

pump in which `means is providedito overcome and counteract the tendency of sand and other substance pumped to` be f disdredging or sand pumping w purposes,I in which the rotor is provided with auxiliary pumping chambers on opposite sides of the main or sand pumping chamber, said auxiliary' pumping chambers inducting. streams of clear water to equalizev lateral pressure circumferentially :of

chamber.

arrangement andfcombinationwof elements.

hereinafter set forth, pointedY out:.in my t My invention consists inthe construction,

claims and illustratednby the accompany-v ing drawing, in whichf Figure l is a side elevation of a: pump embodying myimprovements.` Figure 2 is a longitudinal vertical section through the pumping-chamberand rotor. Figure 3 is a cross-,section on the line 3-.3l`of Figure 2.

In the construction of the device as'shown the'numeral 10 designatesa suitable base-on rotation, said shaft being drivenfrom a suitable source of power by connections to` a beltpulley 14 fixed'to said shaft between said bearings. f kThe shaft 13 ,projects out-.- wardly beyondthe bearing'12 and through a' I stuffing box 15 into the pump housing.` The` pump housing/is of generally circularfform,

concentricv with the shaft 13, 'and is formed A with al central orV main'chamber '16 and with i 'auxiliary chambers 17, 18, on' oppositeysides ,i lof andrcommunicating with said .main cham-` ber, said lateral 'chambers being of lessdi 'ameter than the central chamber. A rotor SWINTEK, a,

the main pumping `fixed to` andv for rotation with the `shaft 13 disks spaced apart. The walls 20, 21 :tormthe sides of the centraly or vmain pumping chamber of the rotor which is located within ythe main pumping chamber k1 6 `of the housing, and are connected transversely at o v spaced finteryals by arcuate vanes 24, in thisy A further obJect of th1s1nvention is tov instance four in number. The wall or partition-.20 isformed on orxed to the hub 19, andthe wall or partition 21 isormed at its inner'circumference 4with an outwardly `directed annular ange ory collar 25, preferablyof somewhat greater diameterthan said `hub 19.f The wall 22g is located outside of Y j and fspacedfromthe wall 20, and is con- A further obJect `of this invention is nto provide an improved centrifugal pump tor` .nectedthereto by arcuate vanes 26; and the wall ..23 is located outside of and spacedv from thewall 21, `and is connected thereto by arcuate vanes 27 vThe lvanes 26, 27 are in vanes 24. rllhe central openings of the walls 22, 23 are 'of greater diameter than vthose of 'theintermediate walls orpartitions 20, 21, so'that said walls 22, 23 are spaced from the rhubl 19 and tlange or collark251 respectively, and annular inlet openings 2829 are pro-y .vided between said members, leading to the auxiliary pumping chambers of the rotor, enclosed'respectively bythe walls 20`22 `and 2l- '23, andl 'located within and dischargingv Scentrifugally to the' auxiliary chambers 17, 18 respectively of thehousing. An induction tube orY sleeve'30 is provided and is "arranged axially of and projecting through theouterfside wall of the pump housing, andv at 'its inner' end is received within and' provides a journal for the collar v or ange'25 of the rotor.- `The induction ,sleeve or tube 30 is formed 'at its outer end 'with a peripheral flange 31 by which it is attached to the flange 32 of an inlet pipe 33, through themediumof bolts 34. The induction sleeve 30 is formed between its ends, `and near its outer end, with a'peripheral Vfiange 35 by. means of which it` isattached rigidly tov a rflange 36 of the pump housing7 through the medium' of bolts 37. The inlet pipe 33 leadsfto'a place fromwhich material" is to beremoved by suction, as to, the bed'of a-body of water, and is yprovided with af. Suitable' :nozzleleta shawn); whereby tween said vanes to the'annu'larV chamber 16 of the housing. An outlet nozzle 38 is provided at the circumference of the central chamber 16 4of the housing, which may receive connection of a pipe`39leading toany suitable place of discharge." `Wa`ter l'inlet pipes 40,41 are provided, each having com- Vmunication'vat'one end with and vnearthe yaxisofv oneof the auxiliary 'or lateral'fchambers 17, 18v of the 4housing, and said hpipes may `be connected attheiroppsite ends 'with 1 a common pipe '42" leadingjto and *beneath the surfa'ce'cf a 'loc'dy of *water Aand adapted 'to draw kWater only yfr'oius'uch s urcefof* supply and `deliver v*it ""t'ojsaid V tihatimers, fthrough the action "fthej vane'sj'26f andi-27 "of the auxiliary 'chambers of I"the"rotola the means 'described fand 'the j`su"ction f'producedgby the vanes"245causes water andsand, yfor instance, to 'be drawn fromtthe bed `lof a river or otherbo'dybf water;through the pipe 33, sleeveBO tof the axial portion cf `the main, pumping chamber of the rotor and discharged vby centrifugal force beyond f the outer ends ofthe lvanes to jthe"annular'por {tion o f the mainchamber 16of'the housing,

whence it is ledaway'thr'oufghthenzzlefBS Vand pipe) tothe placeprovided. l"It is plain v that 'there I'liunSt "be btwe "the out/er circumferences "of vthewalls lor'fpaiftitions'20 ,"21 of'thel rotorfand'theg'walls of4 ythe l "pump' housing, 'and' in'pumping" 'sand' with a" `Apump of'this typefit has been foundthat there is a'considerable tendency t'o'ldisch'arge the sand laterallv over said- Walls ory `parti bersy of therotor, located'on'o'pposite"sides' of "the mainpumping chamber. Whn the rotor is revolved the "suction'l of1 the` vanes26," 27 causes an influx V of water only"thrtnrgh"the f tions, instead ofv'radially i'nto the k chamber 1 6. 'Thiscaus'es excessive friction and wear' betweenthe motor' and housing, necessitating frequent Vreplaeemen't'- or repair ofp'arts, and it isto overcomethis'tendencyandto equali'ze'the lateral pressure, that Ifh'ave provided the two lateral or auxiliary pumping jchampipi-3312- an'dfbranches Av210,;41, itheformer' pipe of `the body of water-iso that "no A*sand is drawn'therethr'ough. AThis waterlxfi's drawn in through the axial,openings"ofthefouter walls l 22,'123 'of the Lro'tjorto Lthe auixili'ary 'x pumping chanibi'arsthereof"aifldfA is discharged I by centrifugal force v-radially `l"by the jv'ahes l"26,1527`to" circumferential-f eraljchanibers 17,?1 Y'ofthe"ifioiisiiig. fTliean- H"nula-r" spafc'e'betwn the@latealichiliersof the rotor and the `circumferenees of the chambers'l', 18 is small so that considerable force is exerted by the water discharged from the auxiliary pumping chambers, which balances, equalizes and counteracts lateral pres- "The 'combined capacity of the two lateral *or auxiliary pumping chambers of the rotor "pi'eferably'is less Athan that'of the main or sand pumping chamber; and means may be 'provided'ifdesired, such yas V'valves in the {pipesOAlffor regulating the flow'jofwater fto" said auxiliarychambers "Iclaiina'siny invention 1;""In 'afentrifugal '-7 ump, a housing *iformedi'witha main chamber and a lateral lchamber.at each side "thereof, said main 4chamber being ofgreater 'diameter than said lateral chambers, and `a rotor mounted for rotation Vin said housing, said Yrotor being formedv'witha' main pumping chamber in the main chamber lo'fsaid'housing, means for fdrawiiig material insuspension into saidI housingand rotor axiallyy of the'inain pumpning fcharn'ber,F a `discharge outlet at the cirlelnlnference of the main 7.chamber of the ihousingysaid rotor beingformed vwith an Aauxiliarypumping chamber at each lside of ."Saiman pumringchamber, Separatemeans f'yfordrawing water only into eachcf said auxiliary pumping ychambers and 'dischargingthesame into the lateralchambers of said housing, thereby'equalizing lateral pressure fromisaidmain pumping chamber. l 2. In a centrifugal pump, a rotor compris- 'inga'isha'fa spacedannular walls fixed to 4said shaft and enclosing a main pumping chamber, v anes` Aconnecting said annular Walls,1 annular l'wallsoutside of and -spaced 'from eachiof the first-mentioned walls and fforming therewitlflateral auxiliary pumpingichambers of lesscapacity than the iirst pumpingchambenand lvenes in each of said auxiliary "pumping chambers, an inletv pipe Vlealdingto and axially of themain pumping "chamber, landan inlet pipe leading to the cen- ,traliportion ofeach of thefauxiliar'y pumping-chambers. f

[na centrifugal pump,`ash aft,` a rotor 'ffrmed Vwith a hub secured to one end of s'faid'shaft, a wall fixed to and radiating `"fromsaidhub, asecond wall ofjannular `-formispacedfrom the first lwall vand yforming therewith fa fmain pumping chamber, vanes 'fixed to aiid'co'nnectingsaid walls, 'an inlet pipe communicating with the aperture of said annular Wall and also forming a journal therefor, annular Walls arranged outside of and spaced from the first mentioned Walls and forming therewithy lateral auxiliary pumping chambers, vanes connecting the outside Walls to the main chamberwalls, the central apertures ofthe outside Walls lbeing of greater diameter than the hub and inlet pipe respectively whereby annular inlet openings are formed leading to the auxiliary i pumping chambers.

4. In a centrifugal pump, a housing formed with a main chamber and lateral chambers at each side of and of less diameter chambers, an inlet pipe leading to and arranged axially of the centralpumping chamber and adapted to deliver material in suspension thereto, such material being dis-y charged centrifugally to the main housing chamber, the outermost Walls of the rotor being of annular form, means for supplying Water to the lateral chambers of the rotor through the central apertures of its outside Walls, which Water is discharged centrifugally to the lateral housing chambers and tends to prevent lateral discharge to said lateral chambers of the material in suspension.

Signed at Des Moines, in the county of Polk and State oi Iowa, this 24th day of March, 1922.

MARTIN SWINTEK. 

